Ravens C Matt Birk is retiring from football.
According to the Ravens, C Matt Birk has scheduled "an announcement" at a community event on Friday.
Ravens C Matt Birk, 36, is still undecided on his future.
Ravens C Matt Birk, 36, says the outcome of next Sunday's Super Bowl will not affect his decision to play a 16th season.
Ravens C Matt Birk (back spasms) missed his sixth straight practice Saturday, and is unlikely to suit up for Baltimore's preseason opener Thursday.
Ravens C Matt Birk (varicose vein surgery) participated in Baltimore's first training camp session Tuesday.
Ravens C Matt Birk underwent surgery to repair a varicose vein issue.
Ravens re-signed C Matt Birk to a three-year contract.
The Ravens and C Matt Birk continue to have contract negotiations.
A source with knowledge of C Matt Birk's thinking tells Profootballtalk the free agent wants to play "a couple more years."
The Ravens are scheduled to meet with the agent for Joe Flacco and free agent C Matt Birk in the next seven to 10 days for contract talks.
The player rep for free agent C Matt Birk says he has opted against retirement, and that "the Ravens seem to want him back."
Free agent C Matt Birk told PFT Live Friday that he will decide between retirement and re-signing with the Ravens in 2012.
Following Sunday's loss to the Patriots, Ravens C Matt Birk said he has not decided if he will retire.